39942637768 has 32 divisors (see below), whose sum is σ = 82018798560. Its totient is φ = 18085089280.

The previous prime is 39942637747. The next prime is 39942637783. The reversal of 39942637768 is 86773624993.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860446 + ... + 905677.

It is an arithmetic number, because the mean of its divisors is an integer number (2563087455).

Almost surely, 2^39942637768 is an apocalyptic number.

It is an amenable number.

39942637768 is an abundant number, since it is smaller than the sum of its proper divisors (42076160792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39942637768 is a wasteful number, since it uses less digits than its factorization.

39942637768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766397 (or 1766393 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 64.

The spelling of 39942637768 in words is "thirty-nine billion, nine hundred forty-two million, six hundred thirty-seven thousand, seven hundred sixty-eight".